How to Install a Deadbolt Latch with Thumbturn Lock

Quick answer

To install a deadbolt latch with a thumbturn lock, you'll need to prepare the door edge, fit the tubular latch, and mount the thumbturn escutcheons on both sides. This guide covers the process for an 82mm deadbolt latch.

Step-by-step installation guide

1. 1. Mark and bore the door edge: Measure and mark the center of the door edge at the desired height (typically aligned with the thumbturn lock). Bore a 1-inch (25mm) hole about 2.5 inches (63mm) deep for the tubular latch body. Use a drill bit that matches the latch diameter exactly. Common mistake: boring too deep can cause the latch to sit loosely; stop at the depth of the latch body.
2. 2. Bore the through-hole for the thumbturn: From the door face, drill a 1-inch (25mm) hole through the door centered on the latch hole. This hole will house the thumbturn spindle. Make sure the hole is perfectly perpendicular to the door face to avoid binding. Checkpoint: use a drill guide or clamp a block of wood to the door to keep the bit straight.
3. 3. Insert the tubular latch: Slide the 82mm deadbolt latch into the edge hole with the faceplate flush against the door edge. Mark the outline of the faceplate, then chisel a shallow recess so the faceplate sits flush. Secure with the supplied screws. Common mistake: not recessing the faceplate enough can prevent the door from closing fully.
4. 4. Install the thumbturn lock escutcheons: Pass the thumbturn spindle through the hole from the interior side. Attach the exterior escutcheon (the one without the thumbturn) on the opposite side using the screws. Then mount the interior escutcheon with the thumbturn, ensuring the spindle engages the latch mechanism. Checkpoint: test the thumbturn before tightening fully to ensure smooth rotation.
5. 5. Align and install the strike plate: Close the door and mark where the latch bolt meets the door frame. Chisel a recess for the strike plate so it sits flush, then secure it with screws. The strike plate must align precisely with the latch bolt for the dual-directional throw to work correctly. Common mistake: misaligned strike plate causes the latch to drag or not fully engage; adjust the recess depth if needed.
6. 6. Test and adjust: Turn the thumbturn several times to check the latch operation. The throw should feel smooth and consistent. If it sticks, check the alignment of the strike plate and the depth of the latch recess. Tighten all screws and verify the door closes without binding. Final check: if the latch feels gritty, remove it and check for debris in the bore hole.

Product details

• DEADBOLT LATCH / THUMBTURN LOCK / 82MM: Tubular deadbolt latches designed to work with our thumbturn locks. Faceplate and strike plate made from machined solid metal with hand brushed surface. Custom-weighted dual-directional throw for smooth consistent feel. The solid metal construction and precise throw mean you need to align the latch and strike plate accurately during installation to maintain the smooth operation and protect the finish.